Web MIDI: introduce MidiService class

content/browser/media/midi_host_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/media/midi_host.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
 #include "content/common/media/midi_messages.h"
 #include "content/public/test/test_browser_thread.h"
 #include "media/midi/midi_manager.h"
+#include "media/midi/midi_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 namespace {
 
 using midi::mojom::PortState;
 
 const uint8_t kNoteOn[] = {0x90, 0x3c, 0x7f};
 const int kRenderProcessId = 0;
 
@@ skipping 26 matching lines @@
     events_.push_back(MidiEvent(DISPATCH_SEND_MIDI_DATA,
                                 port_index,
                                 data,
                                 timestamp));
   }
   std::vector<MidiEvent> events_;
 };
 
 class MidiHostForTesting : public MidiHost {
  public:
-  MidiHostForTesting(int renderer_process_id,
-                     midi::MidiManager* midi_manager)
-      : MidiHost(renderer_process_id, midi_manager) {}
+  MidiHostForTesting(int renderer_process_id, midi::MidiService* midi_service)
+      : MidiHost(renderer_process_id, midi_service) {}
 
  private:
   ~MidiHostForTesting() override {}
 
   // BrowserMessageFilter implementation.
   // Override ShutdownForBadMessage() to do nothing since the original
   // implementation to kill a malicious renderer process causes a check failure
   // in unit tests.
   void ShutdownForBadMessage() override {}
 };
 
 class MidiHostTest : public testing::Test {
  public:
   MidiHostTest()
       : io_browser_thread_(BrowserThread::IO, &message_loop_),
-        host_(new MidiHostForTesting(kRenderProcessId, &manager_)),
         data_(kNoteOn, kNoteOn + arraysize(kNoteOn)),
-        port_id_(0) {}
+        port_id_(0) {
+    manager_ = new FakeMidiManager;
+    service_.reset(new midi::MidiService(base::WrapUnique(manager_)));
+    host_ = new MidiHostForTesting(kRenderProcessId, service_.get());
+  }
   ~MidiHostTest() override {
-    manager_.Shutdown();
+    service_->Shutdown();
     RunLoopUntilIdle();
   }
 
  protected:
   void AddOutputPort() {
     const std::string id = base::StringPrintf("i-can-%d", port_id_++);
     const std::string manufacturer("yukatan");
     const std::string name("doki-doki-pi-pine");
     const std::string version("3.14159265359");
     PortState state = PortState::CONNECTED;
     midi::MidiPortInfo info(id, manufacturer, name, version, state);
 
     host_->AddOutputPort(info);
   }
 
   void OnSendData(uint32_t port) {
     std::unique_ptr<IPC::Message> message(
         new MidiHostMsg_SendData(port, data_, 0.0));
     host_->OnMessageReceived(*message.get());
   }
 
-  size_t GetEventSize() const {
-    return manager_.events_.size();
-  }
+  size_t GetEventSize() const { return manager_->events_.size(); }
 
   void CheckSendEventAt(size_t at, uint32_t port) {
-    EXPECT_EQ(DISPATCH_SEND_MIDI_DATA, manager_.events_[at].type);
-    EXPECT_EQ(port, manager_.events_[at].port_index);
-    EXPECT_EQ(data_, manager_.events_[at].data);
-    EXPECT_EQ(0.0, manager_.events_[at].timestamp);
+    EXPECT_EQ(DISPATCH_SEND_MIDI_DATA, manager_->events_[at].type);
+    EXPECT_EQ(port, manager_->events_[at].port_index);
+    EXPECT_EQ(data_, manager_->events_[at].data);
+    EXPECT_EQ(0.0, manager_->events_[at].timestamp);
   }
 
   void RunLoopUntilIdle() {
     base::RunLoop run_loop;
     run_loop.RunUntilIdle();
   }
 
  private:
   base::MessageLoop message_loop_;
   TestBrowserThread io_browser_thread_;
 
-  FakeMidiManager manager_;
-  scoped_refptr<MidiHostForTesting> host_;
   std::vector<uint8_t> data_;
   int32_t port_id_;
+  FakeMidiManager* manager_;  // Raw pointer for testing, owned by |service_|.
+  std::unique_ptr<midi::MidiService> service_;
+  scoped_refptr<MidiHostForTesting> host_;
 
   DISALLOW_COPY_AND_ASSIGN(MidiHostTest);
 };
 
 }  // namespace
 
 // Test if sending data to out of range port is ignored.
 TEST_F(MidiHostTest, OutputPortCheck) {
   // Only one output port is available.
   AddOutputPort();
@@ skipping 17 matching lines @@
   // Sending data to port 0 and 1 should be delivered now.
   OnSendData(port0);
   OnSendData(port1);
   RunLoopUntilIdle();
   EXPECT_EQ(3U, GetEventSize());
   CheckSendEventAt(1, port0);
   CheckSendEventAt(2, port1);
 }
 
 }  // namespace conent